Collins Aerospace introduces the AN/ARN-147(V) system which combines all VHF Omni Ranging/Instrument Landing System (VOR/ILS) functions into one compact, lightweight, low-cost set. It is the first militarized VHF navigation receiver with MIL-STD-1553B certification. The solid-state system is MIL-E-5400 class II qualified and meets international operability requirements by providing 50-kHz channel spacing for 160-VOR and 40-localizer/glideslope channels. This receiver system is recognized worldwide as a value-added solution on multiple military platforms.
Originally designated as the standard VOR/ILS receiver for the United States Air Force, the An/ARN-147(V) quickly gained acceptance by many military users around the world and is installed on a multitude of platforms, including C-130, C-141, C-5, UH-1N, CH-47, UH-60, T-50 and JAS 39 Gripen.
The AN/ARN-147(V) is a proven design derived from extensive experience in navigation and precision approach and landing systems. As a leading supplier of these systems, Collins Aerospace has designed and manufactured more than 100,000 VHF navigation and landing systems. Solid-state modular design and rugged construction provide long life, high reliability and excellent maintainability for both new and retrofit applications on fixed and rotary-wing aircraft.
The receiver combines all VOR/ILS functions in one compact, lightweight, low cost system. The AN/ARN-147(V) meets multiple stringent MIL-STD requirements, assuring peak performance under the harshest military aircraft environments. With support for both analog and digital (MIL-STD-1553B) interfaces, the AN/ ARN-147(V) is compatible with a variety of aircraft architectures. The AN/ARN-147(V) is available to meet FM broadcast immunity requirements as defined in ICAO Annex 10. Non compliant models can be upgraded with an FM immunity retrofit kit.
Key Features of the AN/ARN-147(V) VHF Omni Ranging/Instrument Landing System:
- Low power, lightweight, solid-state design
- FM broadcast immunity per ICAO Annex 10
- Analog and MIL-STD-1553B interface
- MIL-E-5440 Class 2 environment
- MIL-STD-810 vibration
- MIL-STD-461/462 electromagnetic interface
- Selectable rotor modulation suppression
- High reliability: Predicted mean time between failures is 7,700 hours
AN/ARN-147(V) System Specifications
| Operating Characteristics |
| Frequency Range | 108.00-117.95 MHz |
| Frequency Control | MIL-STD-1553B or ARINC 2-out-of-5 |
| VOR Channels | 160 |
| LOC Channels | 40 |
| Audio Sensitivity | 10 uV |
| Frequency Stability | ±0.005% |
| Flag Sensitivity | 10 uV |
| VOR Low Level | 150 mV at 10 degrees |
| VOR High Level | 2.0 V at 10 degrees |
| MIL-STD-1553B | MIL-STD-1553B 12 bits plus sign, range ±180 degrees, LSB 0.044 degrees |
| LOC Low Level | 90 mV at 0.093 DDM |
| LOC High Level | 1.2 V at 0.093 DDM |
| MIL-STD-1553B | 12 bits plus sign, range ±0.4 DDM, LSB 0.0002 DDM |
| Deviation Accuracy VOR | RTCA DO-196 |
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Glideslope |
| Frequency Range | 329.15 to 335.00 MHz |
| Frequency Control | MIL-STD-1553B or ARINC 2-out-of-5 |
| Channels | 40 with 150 kHz spacing |
| Frequency Stability | ±0.005% |
| Flag Sensitivity | 20 μV |
| Deviation Output Low Levels | 78 mV at 0.091 DDM |
| Deviation Output High Level | 1.04 V at 0.091 DDM |
MIL-STD-1553B
| 12 bits plus sign, range ±0.8 DDM, LSB 0.0002 DDM |
| Deviation Accuracy | RTCA DO-192 |
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| Low Level Flag | +300 to +500 mV, 1 to 5 loads, 1,000 ohms each |
| High Level Flag | +15 to +22 V, 1,500 ohms load minimum |
| Marker Beacon |
| Frequency | 75 MHz |
| Sensitivity | High: 200 to 1,000 μV, Low: 1,000 to 4,000 μV |
| Lamp Outputs | 3 lamps output, +28 VDC lamp load, 340 mA maximum, strappable for single lamp |
| Audio Output | Not less than 100 mW into 150-ohm load, at 10 times lamp threshold |
| Physical Characteristics |
| Size | 4.12 x 5 x 12 in. (W/H/D) |
| Size | 104.6 x 127.3 x 304.8 mm (W/H/D) |
| Weight With MIL-STD-1553B | 8 lbs. (3.6 kg) |
| Weight Without MIL-STD-1553B | 7.5 lbs. (3.4 kg) |
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